Schlagwörter
asia
4
australia
4
belgium
4
brazil
4
china
4
covid-19
4
czech republic
4
epidemic
4
epidemic wave
4
epidemiology
4
europe
4
france
4
germany
4
greece
4
hong kong
4
immunity
4
india
4
iran
4
israel
italy
4
japan
4
lockdown
4
mexico
4
morbidity
4
morocco
4
mortality
4
nigeria
4
norway
4
pandemic
4
phenomenological description
4
philippines
4
portugal
4
protection
4
resurging epidemic waves
4
russia
4
sars-cov-2
4
scandinavia
4
sepsis
4
singapore
4
south africa
4
south korea
4
spain
4
sweden
4
switzerland
4
taiwan
4
the netherlands
4
united kingdom
4
usa
4
virus
4
western europe
4